Recent Record Growth in Atmospheric CO2 Levels

2005 ◽  
Vol 2 (1) ◽  
pp. 3 ◽  
Author(s):  
Roger J. Francey
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Greenhouse Effect ◽  
Fossil Fuels ◽  
Trace Gases ◽  
Atmospheric Co2 ◽  
Past Century ◽  
The Past ◽  
Rate Of Growth ◽  
Co2 Levels

Environmental Context.Excessive levels of carbon dioxide are accumulating in the atmosphere, principally from burning fossil fuels. The gas is linked to the enhanced greenhouse effect and climate change, and is thus monitored carefully, along with other trace gases that reflect human activity.The rate of growth of carbon dioxide has increased gradually over the past century, and more rapidly in the last decade. Teasing out fossil emissions from changes due to wildfires and to natural exchange with plants and oceans guide global attempts in reducing emissions.

Climate Change and Ocean Acidification

2015 ◽  
Author(s):  
Judith S. Weis
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Global Warming ◽  
Ocean Acidification ◽  
Greenhouse Effect ◽  
Fossil Fuels ◽  
The Past ◽  
The Earth

What causes global warming or climate change? The burning of fossil fuels emits carbon dioxide into the atmosphere, which results in the greenhouse effect—less heat can be re-radiated away from the earth, thus raising the temperature of the atmosphere and ocean. In the past...

scholarly journals Effect of Temperature, Water Activity and Carbon Dioxide on Fungal Growth and Mycotoxin Production of Acclimatised Isolates of Fusarium verticillioides and F. graminearum

Toxins ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 478 ◽  
Author(s):  
Ladi Peter Mshelia ◽  
Jinap Selamat ◽  
Nik Iskandar Putra Samsudin ◽  
Mohd Y. Rafii ◽  
Noor-Azira Abdul Mutalib ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Elevated Temperature ◽  
Water Activity ◽  
Fusarium Verticillioides ◽  
Fumonisin B1 ◽  
Fungal Growth ◽  
Effect Of Temperature ◽  
Mycotoxin Production ◽  
Co2 Levels

Climate change is primarily manifested by elevated temperature and carbon dioxide (CO2) levels and is projected to provide suitable cultivation grounds for pests and pathogens in the otherwise unsuitable regions. The impacts of climate change have been predicted in many parts of the world, which could threaten global food safety and food security. The aim of the present work was therefore to examine the interacting effects of water activity (aw) (0.92, 0.95, 0.98 aw), CO2 (400, 800, 1200 ppm) and temperature (30, 35 °C and 30, 33 °C for Fusarium verticillioides and F. graminearum, respectively) on fungal growth and mycotoxin production of acclimatised isolates of F. verticillioides and F. graminearum isolated from maize. To determine fungal growth, the colony diameters were measured on days 1, 3, 5, and 7. The mycotoxins produced were quantified using a quadrupole-time-of-flight mass spectrometer (QTOF-MS) combined with ultra-high-performance liquid chromatography (UHPLC) system. For F. verticillioides, the optimum conditions for growth of fumonisin B1 (FB1), and fumonisin B2 (FB2) were 30 °C + 0.98 aw + 400 ppm CO2. These conditions were also optimum for F. graminearum growth, and zearalenone (ZEA) and deoxynivalenol (DON) production. Since 30 °C and 400 ppm CO2 were the baseline treatments, it was hence concluded that the elevated temperature and CO2 levels tested did not seem to significantly impact fungal growth and mycotoxin production of acclimatised Fusarium isolates. To the best of our knowledge thus far, the present work described for the first time the effects of simulated climate change conditions on fungal growth and mycotoxin production of acclimatised isolates of F. verticillioides and F. graminearum.

Immobilization of catalytic sites on quantum dots by ligand bridging for photocatalytic CO2 reduction

Nanoscale ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 2507-2514 ◽  
Author(s):  
Yipeng Bao ◽  
Jin Wang ◽  
Qi Wang ◽  
Xiaofeng Cui ◽  
Ran Long ◽  
...  
Keyword(s):  
Climate Change ◽  
Carbon Dioxide ◽  
Quantum Dots ◽  
Solar Energy ◽  
Fossil Fuels ◽  
Co2 Reduction ◽  
Energy Crisis ◽  
Great Promise ◽  
Catalytic Sites ◽  
Global Problems

Harvesting solar energy to convert carbon dioxide (CO2) into fossil fuels shows great promise to solve the current global problems of energy crisis and climate change.

Climate Change-Driven Shifts in Elevation and Ecophysiological Traits of Himalayan Plants during the Past Century

2017 ◽  
Vol 112 (03) ◽  
pp. 595 ◽  
Author(s):  
Priyanka Agnihotri ◽  
Tariq Husain ◽  
Pramod Arvind Shirke ◽  
Om Prakash Sidhu ◽  
Harsh Singh ◽  
...  
Keyword(s):  
Climate Change ◽  
Past Century ◽  
The Past ◽  
Ecophysiological Traits

Carbon burial in Bosten Lake over the past century: Impacts of climate change and human activity

2015 ◽  
Vol 419 ◽  
pp. 132-141 ◽  
Author(s):  
Zhitong Yu ◽  
Xiujun Wang ◽  
Chengyi Zhao ◽  
Haiyan Lan
Keyword(s):  
Climate Change ◽  
Human Activity ◽  
Past Century ◽  
Bosten Lake ◽  
The Past ◽  
Carbon Burial ◽  
Impacts Of Climate Change

scholarly journals Features of Transformation and Self-Organization of Mountain Nival-Glacial Geosystems

2021 ◽  
Vol 35 ◽  
pp. 33-43
Author(s):  
A. D. Kitov ◽  
Keyword(s):  
Climate Change ◽  
Formation Rate ◽  
Self Organization ◽  
Past Century ◽  
Mountain Range ◽  
Freezing And Thawing ◽  
Slowing Down ◽  
The Past ◽  
The Law

The Munku-Sardyk mountain range (3,491 m) represents the territory of the modern glaciation of The East Sayan. Different forms of transformation of nival-glacial geosystems have been preserved in this range. The processes of transformation and self-organization of geosystems are considered on the example of the Radde glacier and the unique stone glacier. Due to climate change, the glacier has shrunk considerably. Its area has decreased over 100 years from 0.3 to 0.19 km2, and over the last 20 years from 0.19 to 0.09 km2. However, the glacier has processes of self-preservation, slowing down the process of melting the glacier. This transformation of the glacier is manifested as the reservation of surface moraines. The peculiarities of the formation of surface moraines are considered. In the past century, the formation rate of moraines was 0.001 km2/year. Recently, the rate of formation of moraines has increased to 0.02 km2/year. In the second case, the unique stone stream (stone glacier) is an example of the transformation of the classical glacier into a new structure, which at this stage does not depend significantly on the observed warming, and can exist as an independent object for quite some time. The material is supplied by the rock of mountain range, and the transport by the ice bed is formed in winter from groundwater at the level of indigenous rocks, like subsurface ice. The structure of this stone stream is presented as an independent geosystem. It is assumed that the nival-glacial geosystems behave like lag systems. From the analysis of freezing and thawing of soils it follows that the increase and degradation of glaciers should be subject to the law of hystiresis.

scholarly journals Carbon dioxide retrieval of Argus 1000 space data by using GENSPECT line-by-line radiative transfer model

2019 ◽  
Vol 9 (3) ◽  
pp. 77
Author(s):  
R. K. Jagpal ◽  
R. Siddiqui ◽  
S. M. Abrarov ◽  
B. M. Quine
Keyword(s):  
Carbon Dioxide ◽  
Radiative Transfer ◽  
Greenhouse Effect ◽  
Near Infrared ◽  
Trace Gases ◽  
Radiative Transfer Model ◽  
Transfer Model ◽  
Major Contributor ◽  
Sources And Sinks ◽  
Space Data

The micro-spectrometer Argus 1000 being in space continuously monitors the sources and sinks of the trace gases. It is commonly believed that among other gases CO_2 is the major contributor causing the greenhouse effect. Argus 1000 along its orbit gathers the valuable spectral data that can be analyzed and retrieved. In this paper we present the retrieval of CO_2 gas in the near infrared window 1580 to 1620 nm by using line-by-line code GENSPECT. The retrieved Argus 1000 space data taken over British Columbia on May 31, 2010 indicates an enhancement of CO_2 by about 30%.

scholarly journals The Problem with People

2011 ◽  
Vol 1 (1) ◽  
Author(s):  
David Campbell
Keyword(s):  
Climate Change ◽  
Energy Supply ◽  
Fossil Fuels ◽  
Energy Resources ◽  
Political Issue ◽  
The Public ◽  
The Past ◽  
Primary Driver ◽  
Change Problem ◽  
Energy Supply Security

Climate change has become a critical political issue in the past twenty years. However, there is a related issue that is often overlooked by governments, industry, and the public: energy supply security, defined by the IAEA (2007) as “...the ability of a nation to muster the energy resources needed to ensure its welfare” (n.p.). Conventional energy requires the burning of fossil fuels, which releases carbon dioxide, the primary driver behind climate change (Pulles & Amstel, 2010, p. 4). Because of this, the problems of our dependence on fossil fuels and carbon fuelled global warming are interrelated. As such, solving the climate change problem may mitigate energy concerns. However, the potentially disastrous consequences of climate change will not be felt immediately while energy is critical to our daily survival; so, energy issues are arguably a more pressing concern.

scholarly journals Relative impacts of global changes and regional watershed changes on the inorganic carbon balance of the Chesapeake Bay

2020 ◽  
Author(s):  
Pierre St-Laurent ◽  
Marjorie A. M. Friedrichs ◽  
Raymond G. Najjar ◽  
Elizabeth H. Shadwick ◽  
Hanqin Tian ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Chesapeake Bay ◽  
Carbon Balance ◽  
Inorganic Carbon ◽  
Regional Scale ◽  
Nitrogen Loading ◽  
Atmospheric Co2 ◽  
Past Century ◽  
Global Changes ◽  
The Past

Abstract. The Chesapeake Bay is a large coastal-plain estuary that has experienced considerable anthropogenic change over the past century. At the regional scale, land-use change has doubled the nutrient input from rivers and led to an increase in riverine carbon and alkalinity. The Bay has also experienced global changes, including the rise of atmospheric temperature and CO2. Here we seek to understand the relative impact of these changes on the inorganic carbon balance of the Bay between the early 1900's and the early 2000's. We use a linked land-estuarine-ocean modeling system that includes both inorganic and organic carbon and nitrogen cycling. Sensitivity experiments are performed to isolate the effect of changes in: (1) atmospheric CO2, (2) temperature, (3) riverine nitrogen loading and (4) riverine carbon and alkalinity loading. Specifically, we find that over the past century global changes have increased ingassing by roughly the same amount (~30 Gg-C yr−1) as has the increased riverine loadings. While the former is due primarily to increases in atmospheric CO2, the latter results from increased net ecosystem production that enhances ingassing. Interestingly, these increases in ingassing are partially mitigated by increased temperatures and increased riverine carbon and alkalinity inputs, both of which enhance outgassing. Overall, the Bay has evolved over the century to take up more atmospheric CO2 and produce more organic carbon. These results suggest that over the past century, changes in riverine nutrient loads have played an important role in altering coastal carbon budgets, but that ongoing global changes have also substantially affected coastal carbonate chemistry.

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